Wall insulation electric box and camera/light holder

What is it?

When mounting electrical socket, switch or camera on external insulated wall you have to screw it "to something", you can either prepare in advance (before wall is insulated) or later you are force to mount it to insulation layer only. This is my approach to this problem.

I wanted to leverage here 3d printing capabilities, so for example it can print internal insulation with closed cell infill (like Cubic). Also you don't have to cut it - if you can print it exactly as needed. And finally, it's cheaper (what is a bit surprising) then commercial solutions.

Components

There are electrical extenders - for electrical sockets or switches. In those you mount directly electric components - keep in mind that some countries may have special requirements for materials used for those prints.

And there are wall extenders, for various fixtures like camera, lights, sensors. It consist of two pieces, one is extender for 20cm or 15cm wall insulation, and other is a face plate that you should screw with extender.

In tool directory there is also a drill for 20cm insulation wool - to create holes for extenders. You should mount it on M10 hex screw and use slow RPM drill to cut the hole.

How to print?

I've design all the components to be printed flat, without need for supports. But keep in mind, that this kind of item positioning requires good layer adhesion. I've tested quite a lot of them, and this was not a problem for my regular prints (I have heated chamber printer - which is important for ABS prints for example).

Materials

I've made most of the prints from ABS, it has excellent layer adhesion (at least in my printer with closed chamber) and for sure enough temperature resistance. I've also tested PETG, witch should be totally enough - it has even better layer adhesion, but ABS seems to be better suited for long term solution like this.

You could also consider FR V0 (Flame Retardant) materials for electrical components - you can find both ABS and PETG blends. This should be along with some electrical requirements in EU.

For camera holders you could use PETG/ABS GF/CF - for stronger/stiffer component. But this has weaker layer adhesion - so it's up to you.

Infill

For most of the parts you should use infill closed cells - for insulation purpose - so any kind of cubic one should be good. I've printed mine at 20-25% - so the air pockets are small.
The plates for camera/light fixture should be printed with grid (or similar) infill - so if you have to screw in it, it will be able to hold the screw.